iPhone A was in perfect working order while iPhone Z showed no signs of life. To test if the iPhone Z screen assembly was operable I swapped the two screen assemblies out. iPhone Z screen assembly still showed no signs of life once installed on the iPhone A's logic board. So, moving forward I re-installed my orginal screen assembly on iPhone A only find that it also did not work now. I figure I botched something simple so I go back to check my work. After uninstalling & re-installing a number of times the assembly still does not work. Now, this whole time my phone is ringing off the hook, i'm receiving emails, receiving my notifications, etc. Itunes still recognized the phone.

So I fiddle with iPhone Z a bit, as i'm frustrated with iPhone A. Finally, iPhone Z works but has underlying issues from my buddy jailbreaking it. I proceed to test the screen assembly from my iPhone A on the iPhone Z logic board....the screen assembly works!

Back to iPhone A.
Phone works
Screen assembly works, just not on it's own logic board

This leads me to believe I may have damaged the FPC connector on the logic board in the process. I examined the connectors pins underneath a microscope, nothing seems bent broken but possibly a minute amount of corrosion. I put the logic board in iso alcohol for 25-30 minutes, dried it for 6-8 hrs, re installed the logic board. Back to square one, the phone works i'm receiving all my notifications but no display.

I may have answered my own question here, but I guess I'm looking for re-assurance. Is the connector on the logic board toast? Bums me out as I would attempt to solder a new connector but I have no soldering gun and have never soldered anything in my life.

If anyone has any advice my ears are open.
Thanks
Sorry for the book I wrote